Your warrior source code will need some metadata in the header, like this:

;redcode-94
;name My Warrior
;author John Doe
MOV 0, 1

Replace "My Warrior" with the name you want to give your warrior, and "John Doe" with your name. We will be using the Redcode-94 standard as outlined in the beginner's guide linked above. Name the file mywarrior.red or similar.